Metal panel-work.



M. LACH MAN.

METAL PANEL WORK.

APPLICATION FILED MAY 6. 1913.

Patented Jan. 2, 1917.

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MAURICE LAGHMAN, OF NEW YORK, N. Y., ASSIGNOR TQ UNIVERSAL ELECTRIC WELD- ENG COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

METAL PANEL-WORK.

Specification of Letters Patent.

Patented Jan. 2, 1917.

Application filed May 6, 1913. Serial No. 765,780.

, citizen of the United States, and a resident of New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Metal Panel-Work, of which the following is a,

specification.

My present invention relates to sheet metal constructions and particularly to panel constructions in which a metallic panel is surrounded by a sheet metal frame to which the panel is secured.

The object of this invention is to avoid the expensive hand-mitering of the corners of the molding members, when such members are employed.

It has heretofore been the practice to cut, file and fit the opposed ends of adjacent molding members by hand to effect any reasonably efficient jolnt and the expense of this operation has been a large part of the cost of the paneled construction. This is especially true in the case of metallic doors which, usage dictates, must have moldings and it has been greatly responsible for the high cost of these doors and therefore ac? counts for the main objection to their use.

The invention is particularly applicable to,

the construction of such paneled structures as sheet metal doors and it will be described as applied to this use, it being'understood however thatthe invention is not limited thereto.

The invention consists in the improved constructions hereinafter more particularly described and then specified in the claims.

In the accompanying drawings Figure 1 is a front elevation of a sheet metal door constructed in accordance with this invention. line 2-2 Fig. 1. Fig. 3 is an enlarged crosssection of one corner joint of the door and taken on the line 3 Flg. 1. Fig. 4 is a similar cross-section taken on the line 4 Fig. 1. Fig. 5 is a perspective view of one corner of the construction. Fig. 6 is a cross-section illustrating a modification in the manner of joining the stile and panel sections together. Fig. 7 is a detached View of one of the corner pieces.

1 indicates the panel of a door preferably made up of two metal plates or sheets spaced apart any desired distance by blocks 2 secured in any desired manner to the panel plates 1. The space within the panel may,

Fig. 2 is'a cross-section taken on the v if desired, be filled with sound-deadening material as well known in the art.

3 and 4 indicate the side frame or stile sections of the door while 5 and 6 indicate the top and bottom frame or stile sections respectively. Between the inner edges of the stile sections 3, 4, 5 and 6 and the surface of the panel 1 are formed or secured molding members 7 of any desired surface conformation or ornamentation. The molding members may form part of or be secured to either the stile section or the panel member as will hereinafter appear. After the stile or frame sections are secured to the panel member as will be presently described, they may be joined to each other along the meeting edges 8 by brazing, soldering or any of the other methods now well known in the art.

As illustrated in Figs. 1 to '5 inclusive, the molding member 7 is integral with the panel plate 1' and by means of suitable dies stamped into the desired form. In this form, the molding member has an outwardly extending flange 9 which projects for a greater or less extent into the space within the stile sections and contacts with the inner surface of the side thereof, the flange 9 being offset from the molding whereby a shoulder 10 is formed at the inner edge of the stile section. The inner edge of the stile sections is turned over the shoulder 10 as at 11 and preferably contacts with the vertical wall of said shoulder, the free edge preferably engaging or seating on the surface of the molding 7 to form a close joint and prevent any raw edge of the metal being visible.

The flange 9 is welded to the inner surface of the face of the stile member preferably by a number of spot welds 13 disposed preferably near the longitudinal edge of the stile member. As will be readily understood by those skilled in the electric metal Working art, the parts are assembled between suitable current carrying electrodes 14, 15 (Fig. 4) and a current of electricity passed from one electrode to the other through the material located between them. After the metal has softened, due to the heating effect of the curfrom the end of the stile section and after the welding is finished this end may be closed by soldering or brazing a closure therein as is wellf'known in this art.

.Should the inner edge of the stile members terminate on a line with the surface welded as for instance at 16, the welding operation would cause a buckling of the stile member and the edge 16 would become rough and have a serrated appearance. By

,ing, as above described, takes place between the flanges 17 and 18 while the turned-over edge 25 prevents buckling as above described.

The corners of the molding members 7 must, as is understood in the art, be cut out, the practice heretofore being to carefully mate and lit the opposed molding ends so formed to close the corner and present a good miter or junction.- According to my invention, the molding at the corners is cut away any desired extent so that the opposed ends may come more or less close to each other, it not being necessary that they even meet. v

20 indicates a hollow metal block or corner piece having a preferably flat upper surface and vertical sides 21 and The sides 21. and QQ'are cut away as at 23 to fit snugly over adjacent molding members 7 and the block 20 is placed over the 0pposed cut-away ends of the moldings in such position that it spans and conceals such ends.

A corner piece 20 is provided in each corner formed by the frame or stile sections on both sides of the panel members 1. If desired the two corner pieces in each corner may be secured to each other by a post or connecting-piece 24: electrically welded in any desired manner to the tops of such pieces. The posts 24: are located within the stile sections and are disposed in the space between the opposed ends of the other than those illustrate-d herein and that such modifications are within the scope of this invention as expressed in the appended claims.

The sheet metal joint herein illustrated and described is not claimed in this application as the same forms the subject of a divisional application for patent filed by me on Oct. 21th, 1913, S. N. 797,034. Vhat I claim as my invention is I 1. In a metal panel construction, the

combination of a panel, frame sections secured to the panel, moldings between the panel and frame sections and a metal cor ner piece having sides abutted laterally against the inner edges of adjoining frame sections and also perpendicular depending sides fitted to adjacent moldings, said corner piece spanning and concealing the junction of the moldings.

2. In a sheet metal door construction, the combination of a panel member, stile sections secured to said panel member, molding members, hollow metal blocks on opposite surfaces of said panel member inv the corners formed by the stile sections, said blocks being fitted to the moldings and concealing the ends of adjacent members and a post welded to said blocks to join them together and to the door.

3. In a sheet metal door construction, the

combination of a panel member, stile sec.

tions secured to said panel member, molding members, hollow metal blocks on opposite surfaces of said panel member in the corners formed by the stile sections, said blocks having depending sides fitted to the moldings and means securing said blocks to each other and to the door.

. Signed at New York, in thecounty of New York and State'of New York, this 5th day of May, A. D. 1913,

MAURICE LACHMAN.

Witnesses:

F. B. TOWNSEND, K. M. MCMAHON. 

